It depends. Last week when he was doing cluster feeding. He Just demanded feed all the time. The overall did add up to 120ml. Now he is back to 1.5--2.5hr sleep with 120ml. I suspect the fast flow teat is causing the problem as well.
Yes I also thought that's a lot. Last night he came off for boobs screaming for more. My supply isn't constant. Sometime more. Sometime less. So hard to tell.